I work in car insurance guy for a living at what the majority of people are saying is correct. I speak to maybe 3-5 people a day who have 'fronted risk' policies.
Mum or Dad insure the car, even put the car in their name. We can always tell as insurer's for example - dad a a VW Passat TDI, he aint gonna go and by am MGZR for a spare car that his son might be 'allowed' to use 'occasionally'.
It is because of people ripping off insurers that the honest people out there have to pay extortionate prices to be road legal. im 20, and have my rover 25 tpft with all the mods declared. If you write off a car which you have under anybody's else's name (fronted risk), then the insurer's can check with the police, dvla, vosa, and also get fraud departments to look into it.
Ive heard or major insurer's taking people to court after major accidents. Persons going to court and jail! If you get randomly spot checked by the police and they call the insurer and the car is modified and not declared you have have the vehicle impounded as it is not insured technically. Points on your license, being banned etc.
As dan said, its nothing to be proud of. It is illegal and if you cant afford the insurance dont drive, i didnt start learning till i was 19 and had a proper job to be able to pay for insurance.
Also for people who think they are building up no claims when they are on mum n dad's insurance . . . you're not. Its called 'named driver' no claims, usually specific to that company so if you want to use it you have to take insurance out with that same company.
Adam